To be honest I did not. I am happy with the procedural/OO code I write in Python. But whenever I even see functional code, I can't even read it.
I don't want to learn something else ;)
Maybe programming isn't for you then.
Personally I find those that equate learning new things in CS with learning new programming paradigms (while common on HN/Reddit) to have a very skewed understanding of what computer science is about.
What I'm trying to say is that it's very likely the user doesn't even know what "functional" means. They just hear some keyword they don't understand and dismiss anything that follows. Because when you think about it, it doesn't really make any sense that a programmer could be a programmer if they couldn't look up things they don't understand.